The physical action of wrapping the feet around a branch, twig, powerline, or other thin object and sitting. The position of the legs on the body, as well as the tail, help a bird to keep its balance while perching. Interestingly enough, birds have evolved so that feet wrapped around something are relaxed and in the natural position; to exercise and tense up their feet, birds actually have to spread ther toes.

roosting or standing on something like a branch.

Male butterflies on an object awaiting passing females or rival males.

(verb) - landing on a tall plant or other object for the purpose of searching out a mate.

Inspection of cloth for defects while it is run over a roller.